Shaft rockers with .450 offset on intake are needed.I normally use the Edelbrock 2926 raised runner intake but about any raised runner intake will work without spacers.I have used the 2968 Edelbrock but I think that engine had a Holley 300-41 but they are hard to find.I build these engines for dirt track steelhead class but I think some NHRA econo dragster classes use them.This is a brand new set ported by Rons that I don't need.I think RHS quit making them but a few of them are still available.This dyno sheet is of an engine sold to a dude in South Carolina.[attachment=0]Brant Carey 361ci.jpg[/attachment]